Weather on May 15
Fullerton, CA
55 Years of Data
Avg High
76°F
Avg Low
57°F
Warmest
2014
87°F avg
Coldest
1974
59°F avg
About This Date
May 15th in Fullerton, CA typically brings pleasant spring weather, with average highs around 76°F and lows near 57°F. Over 55 years of records, the warmest May 15th was in 2014 (87°F average), while the coldest was 1974 (59°F) — a 28°F range across recorded history. Rain or other precipitation has occurred on about 5% of May 15th dates historically, with the wettest May 15th recording 0.58" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for May 15th in Fullerton, CA? Great weather for outdoor activities.
Warming Trend
1.1°F per decade on this date
| Year | High | Low | Avg | Precip | Snow |
|---|---|---|---|---|---|
| 2025 | 74° | 56° | 65° | — | — |
| 2024 | 69° | 59° | 64° | — | — |
| 2023 | 77° | 61° | 69° | — | — |
| 2022 | 95° | 61° | 78° | — | — |
| 2021 | 75° | 59° | 67° | — | — |
| 2020 | 79° | 59° | 69° | — | — |
| 2019 | 74° | 62° | 68° | — | — |
| 2018 | 73° | 55° | 64° | — | — |
| 2017 | 68° | 56° | 62° | — | — |
| 2016 | 72° | 61° | 66° | — | — |
| 2015 | 70° | 54° | 62° | 0.58" | — |
| 2014warmest | 104° | 69° | 87° | — | — |
| 2013 | 81° | 59° | 70° | — | — |
| 2012 | 78° | 54° | 66° | 0.03" | — |
| 2011 | 66° | 54° | 60° | 0.13" | — |
| 2010 | 77° | 58° | 67° | — | — |
| 2009 | 78° | 60° | 69° | — | — |
| 2008 | 88° | 60° | 74° | — | — |
| 2007 | 74° | 58° | 66° | — | — |
| 2006 | 82° | 62° | 72° | — | — |
| 2005 | 85° | 60° | 72° | — | — |
| 2004 | 88° | 59° | 73° | — | — |
| 2003 | 74° | 53° | 63° | — | — |
| 2002 | 76° | 57° | 66° | — | — |
| 2001 | 76° | 58° | 67° | — | — |
| 2000 | 76° | 52° | 64° | — | — |
| 1999 | 69° | 55° | 62° | — | — |
| 1998 | 72° | 49° | 60° | — | — |
| 1997 | 85° | 64° | 74° | — | — |
| 1996 | 78° | 64° | 71° | — | — |
| 1995 | 70° | 54° | 62° | — | — |
| 1994 | 72° | 59° | 65° | — | — |
| 1993 | 87° | 62° | 75° | — | — |
| 1992 | 74° | 62° | 68° | — | — |
| 1991 | 82° | 52° | 67° | — | — |
| 1990 | 70° | 58° | 64° | — | — |
| 1989 | 67° | 57° | 62° | — | — |
| 1988 | 73° | 58° | 65° | — | — |
| 1987 | 70° | 59° | 64° | — | — |
| 1986 | 70° | 59° | 64° | — | — |
| 1985 | 74° | 55° | 64° | — | — |
| 1984 | 69° | 51° | 60° | — | — |
| 1983 | 72° | 55° | 63° | — | — |
| 1982 | 78° | 47° | 62° | — | — |
| 1981 | 69° | 54° | 61° | — | — |
| 1980 | 67° | 51° | 59° | — | — |
| 1979 | 78° | 54° | 66° | — | — |
| 1978 | 77° | 59° | 68° | — | — |
| 1977 | 66° | 55° | 61° | — | — |
| 1976 | 78° | 56° | 67° | — | — |
| 1975 | 69° | 55° | 62° | — | — |
| 1974coldest | 63° | 56° | 59° | — | — |
| 1973 | 79° | 54° | 66° | — | — |
| 1972 | 80° | 54° | 67° | — | — |
| 1971 | 74° | 55° | 64° | — | — |
55 years of data from ANAHEIM